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2. Cannabis drug testing - Wikipedia

   en.wikipedia.org/wiki/Cannabis_drug_testing

   Cannabis use is detectable with hair tests and is generally included in the standard hair test. Hair tests generally take the most recent 1.5 inches of growth and use those for testing. That provides a detection period of approximately 90 days. [5] If an individual's hair is shorter than 1.5 inches, this detection period will be shorter.

3. Hair analysis - Wikipedia

   en.wikipedia.org/wiki/Hair_analysis

   Chemical hair analysis may be considered for retrospective purposes when blood and urine are no longer expected to contain a particular contaminant, typically three months or less. Its most widely accepted use is in the fields of forensic toxicology, in pre-employment drug testing and, increasingly, in environmental toxicology.

4. Drug test - Wikipedia

   en.wikipedia.org/wiki/Drug_test

   Hair drug testing is a method that can detect drug use over a much longer period of time than saliva, sweat or urine tests. Hair testing is also more robust with respect to tempering. Thus, hair sampling is preferred by the US military [66] and by many large corporations, which are subject to Drug-Free Workplace Act of 1988.

5. How Common Is Teenage Hair Loss? - AOL

   www.aol.com/common-teenage-hair-loss-125700178.html

   Growing hair is like a workout for your scalp — hair follicle cells are the most rapidly dividing cells in the body, so it takes lots of energy to produce new hair. ... A 2020 meta-analysis of ...

6. Forensic toxicology - Wikipedia

   en.wikipedia.org/wiki/Forensic_toxicology

   Chemicals in the bloodstream may be transferred to the growing hair and stored in the follicle, providing a rough timeline of drug intake events. Head hair grows at rate of approximately 1 to 1.5 cm a month, and so cross sections from different sections of the follicle can give estimates as to when a substance was ingested.

7. Hair type chart: How to find your hair type, from straight 1A ...

   www.aol.com/lifestyle/hair-type-chart-hair-type...

   The original hair type chart, also known as the hair typing system, was created by Andre Walker, Oprah Winfrey's hairstylist, in the 1990s. He debuted the system on Winfrey's show to promote his ...